JP6075358B2 - Guard device for work machine - Google Patents

Description

  The present invention relates to a guard device for protecting a cab in a work machine such as an excavator.

  In a working machine such as an excavator, a guard device may be attached to the outside of a cab window.

  For example, in a shovel, a guard device is configured by a guard that covers the front of the cab from the outside and a mounting bracket that attaches the guard to the front of the cab, and the front of the cab can be protected from rocks flying from the front during work. .

Among such guard devices, several methods have been proposed for improving visibility and maintenance by making the guard movable.

For example, the guard device described in Patent Document 1 divides the guard into two or more, enables each of the divided guards to move between the first position and the second position, and the first position and the second position. It can be fixed at the position.

In addition, the guard device described in Patent Document 2 has roller guide rails extending from the front side of the outer peripheral surface portion of the cab to the rear side through the upper surface side, and roller guide rails extending in the longitudinal direction of the cab guard. Is formed into a plurality of guard plate members, and the plurality of guard plate members are connected to each other so as to be able to be bent in the front-rear direction, and the cab guard is slidably fitted along the roller guide rail. Configured.

JP-A-9-228422 JP 2008-100442 A

  In any of the above-described prior arts, in order to improve the field of view of a window, it is necessary to move a guard that covers the window, and a portion that is not covered by the guard and is not protected is generated.

  In general, the guard is made of metal and is heavy. However, in order to improve the field of view of the entire window, it is necessary to move the guard greatly, which requires labor.

The present invention has been made from the above viewpoint, and an object of the present invention is to provide a guard device that secures a function of protecting a window to some extent even if the guard is moved, and reduces the labor required to move the guard. is there.

As means for solving the above problems, in the present invention, in a cab guard device for protecting a cab of a work machine,
A fixed guard which is attached to the outside of the cab window via a mounting bracket and forms a rectangular frame frame by a vertical beam and a horizontal beam, and is held by the fixed guard and can be moved in the vertical direction or the horizontal direction of the fixed guard. With a moving guard
The fixed guard is configured so that a plurality of fixed-side bars in the frame are parallel to the vertical beam or the horizontal beam and maintain a predetermined interval,
The movement guard is composed of a plurality of movement side bars arranged in parallel with the same direction as the direction of the fixed side bar and parallel to each other, and a movement side coupling member connecting the movement side bars .
A matching state proximate to overlap with one of the stationary bar of said movable rod when viewed from directly facing direction to the window adjacent the movable rod when viewed from directly facing direction to the window There can be changed in a mismatch condition located between in said stationary bar adjacent said,
In the two states, the movement guard can be fixed to the fixed guard (Claim 1).

In this configuration, when the moving guard is moved in the vertical direction or the horizontal direction with respect to the fixed guard as viewed from the direction facing the window, the interval between the fixed bar and the moving bar can be adjusted. In the coincidence state, the field of view of the entire window can be improved while ensuring the function of protecting the front window to some extent, and in the disagreement state, the front is almost the same as a general guard device. Windows can be protected.

Further, in order to change the coincidence state and the disagreement state, it is only necessary to move the moving guard, and the movement is performed at a position where the moving side bar is close to one of the adjacent fixed side bars. And the position between the adjacent fixed-side bar members as viewed from the direction facing the window is changed, and it is not necessary to move the moving guard greatly, and labor can be reduced.

In the present invention, the fixed guard is attached to the front surface of the cab via the mounting bracket so as to be opposed to the outside of the window with a gap therebetween, and a plurality of the fixed-side bar members are provided in the frame. It is configured to be parallel to the vertical beam and keep a predetermined interval,
The moving guard is movable in the lateral direction of the fixed guard, and the movement in the vertical direction is restricted. In the coincidence state, the moving side bar is adjacent to one of the fixed side bars and either the front, back, left or right It is desirable that the moving bar is positioned between the adjacent fixed bars when viewed from the front and rear direction in the inconsistent state.

In this configuration, the window is a front window of the cab, and in the coincidence state, the moving side bar overlaps with the fixed side bar as viewed from the front-rear direction of the cab, and a large field of view of the front window is ensured. can do.

In addition, by attaching the cab guard device to the front window, it is possible to change the coincidence state and the disagreement state by simply moving in a lateral direction without lifting the moving guard, which is a heavy object, thereby reducing labor. .

In the present invention, the moving bar is overlapped with the fixed bar when viewed from the direction facing the window at a position farther from the cab than the fixed bar in the aligned state. It is desirable to be provided (Claim 3).

In this configuration, in a state where the moving bar is close to the fixed bar, the moving bar overlaps the fixed bar when viewed from the direction facing the window, and the field of view of the front window Can be secured greatly.

In the present invention, it is desirable that the moving bar is in the disagreement state, the distance from the window is equal to the fixed bar, and is arranged side by side with the fixed bar (Claim 4). .

In this configuration, in the disagreement state, it is possible to suppress protrusion of the moving side bar to the outside with respect to the fixed side bar.

In the present invention, the fixed guard or the moving guard is configured such that the moving bar is adjacent to the position where the moving bar is close to the fixed bar and the direction facing the window. It is desirable to provide a rail for holding the movement guard so as to be movable between positions between the bars.

In this configuration, the moving guard is movably held by the fixed guard via the rail.

In the present invention, the moving bar is provided with an engaging portion, and the engaging portion has an engaging hole inserted through the horizontal beam or the vertical beam along the moving direction of the moving guard. (Claim 6).

In this configuration, the moving guard is held by the fixed guard by inserting the horizontal rail through the engaging portion.

In the present invention, the engagement hole is inserted through a fixed side connecting material, and the fixed side connecting material is provided in the fixed guard, intersects the fixed side bar vertically, and connects the fixed side bar. (Claim 7).

In this configuration, the plurality of fixed-side coupling members described above connect the fixed-side bar members, and the strength of the fixed guard can be improved.

The moving guard is stably held when the fixed-side connecting member is inserted into the engagement hole in addition to the vertical beam or the horizontal beam.

In the present invention, it is preferable that the moving guard includes a plurality of the moving side connecting members, and the moving side connecting members intersect the moving side bars perpendicularly and connect the moving side bars. 8).

In this configuration, the plurality of moving-side connecting members connect the moving-side bar members, whereby the strength of the moving guard can be improved.

In the present invention, it is preferable that the moving side connecting member is provided so as to overlap with a side of the horizontal beam or the vertical beam separated from the window along the moving direction of the moving guard.

In this configuration, the connecting material avoids obstructing the field of view in the front-rear direction by overlapping the outside of the horizontal beam or the vertical beam along the moving direction of the fixed-side connecting material or the moving guard. ing.

In this invention, the said movement side connection material may be provided so that it may overlap with the side away from the said window of the said fixed side connection material (Claim 10).

In this configuration, the connecting material overlaps the outside of the fixed-side connecting material, thereby avoiding obstructing the field of view in the front-rear direction.

In the present invention, it is desirable that the fixed guard or the movement guard is provided with a detachable block, and the block abuts on either the fixed guard or the movement guard to prevent the movement guard from moving ( Claim 11).

In this configuration, the movement guard is prevented from moving by the block attached to the fixed guard or the movement guard, and the coincidence state and the disagreement state can be maintained.

In the present invention, a moving side hole is formed in the moving guard, a fixed side hole is formed in the fixed guard, and the moving side hole and the fixed side hole are overlapped with the moving side hole and the fixed side hole. It is desirable that a screw passing through the hole is inserted (claim 12).

In this configuration, the moving guard can be fixed to the fixed guard in a state where the moving side hole and the fixed side hole overlap.

In the present invention, as the moving guard moves, the vertical beam or the horizontal beam viewed from the direction facing the window in the unmatched state is close to either the vertical beam or the horizontal beam in the coincidence state. It is desirable that the moving bar located between any of the bars and the fixed bar is added (claim 13).

In this configuration, the end of the window is protected by the frame of the fixed guard and the moving bar of the moving guard.

According to the cab guard device of the present invention, even when the moving guard outside the cab window is moved to improve visibility, the front guard is protected to some extent by the fixed guard, and the labor required to move the moving guard is reduced. it can.

It is a perspective view which shows the closed state of the upper guard of the cab of Embodiment 1. FIG. It is a perspective view which shows the open state of the upper guard of the cab of Embodiment 1. FIG. It is a perspective view of the guard apparatus of Embodiment 1. It is a perspective view of the fixed guard of Embodiment 1. It is a perspective view of the movement guard of Embodiment 1. In the front view of the cab of Embodiment 1, (a) shows a match state and (b) shows a mismatch state. It is an enlarged view of 14a vicinity of Fig.6 (a). It is a perspective view which shows the closed state of the upper guard of the cab of Embodiment 2. It is a perspective view which shows the open state of the upper guard of the cab of Embodiment 2. It is a perspective view of the guard apparatus of Embodiment 2. It is a perspective view of the fixed guard of Embodiment 2. It is a perspective view of the movement guard of Embodiment 2. In the front view of the cab of Embodiment 2, (a) shows a coincidence state and (b) shows a disagreement state. An enlarged view of the vicinity of 14a in FIG. 13 (a) shows how the block 81a is attached. FIG. 13B is an enlarged view of the vicinity of 81c and shows a state where the block 81b is attached. An enlarged view of the lower half of FIG. 13 (b) shows how the block 92 is attached.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1>
  As shown in FIGS. 1 and 2, a guard device 3 that protects the cab 1 and the operator is provided in front of a front window 2 provided on the front surface of the cab 1.

The front window 2 includes an upper window 2a and a lower window 2b, and the guard device 3 includes an upper guard 4 that covers the upper window 2a and a lower guard 5 that covers the lower window 2b.

The left and right ends of the lower guard 5 are attached to the lower part of the front surface of the cab via attachment brackets 10.

On the other hand, the upper guard 4 is attached to the left and right end sides by upper and lower hinges 11 and 12 so as to be freely opened and closed.

Locking devices 13a and 14a are provided on the upper and lower sides of the upper guard 4 opposite to the hinges 11 and 12, and when the upper guard 4 is closed, the locking devices 13b and 14b are engaged and locked.

If the opening / closing function of the upper guard 4 is unnecessary, the upper guard 4 may be attached to the front surface of the cab via an attachment bracket in the same manner as the lower guard 5.

As shown in FIG. 3, the upper guard 4 includes a fixed guard 20 and a moving guard 21 that is held in front of the fixed guard 20.

As shown in FIG. 4, the fixed guard 20 has a plurality of fixed-side bar members 25a, 25b, and 25c vertically arranged in a frame 24 on a rectangular frame formed by vertical bars 22a and 22b and horizontal bars 23a and 23b. They are arranged in parallel with the bars 22a and 22b at a predetermined interval.

Further, a plurality of fixed side connecting members 30a and 30b for connecting the fixed side bars 25a to 25c and the vertical bars 22a and 22b are provided, and the strength of the fixed guard 20 is maintained.

Rail portions 31 and 32 for holding the movement guard 21 so as to be movable in the lateral direction are provided on the upper horizontal rail 23a and the lower horizontal rail 23b so as to face each other.

Screws are engraved in the fixed side holes 33a and 33b provided in the horizontal rail 23a and the fixed side holes 34a and 34b provided in the horizontal rail 23b, and are used when the moving guard 21 is fixed to the fixed guard 20.

As shown in FIG. 5, the movement guard 21 is composed of a plurality of movement side bars 40a, 40b, 40c, and 40d arranged in a row and movement side coupling members 41a, 41b, 41c, and 41d that connect the movement side bars. The

The movement guard 21 maintains the strength by providing a plurality of movement side coupling members 41a to 41d.

The moving side bars 40a to 40d are arranged so as to maintain a parallel and equivalent distance to the fixed side bars 25a to 25c and the vertical rail 22a.

Protruding portions 42 and 43 that engage with the rail portions 31 and 32 are attached to the upper and lower moving side coupling members 41a and 41d, respectively.

The protrusions 42 and 43 may be divided into several parts as illustrated, or may be configured as a single unit.

Further, the moving side connecting members 41 a and 41 d are extended to the left and right end sides, and screws are engraved in the moving side holes 44 and 45 provided in the extending portion, and are used when the moving guard 21 is fixed to the fixed guard 20. .

FIG. 3 shows a state in which the protruding portions 42 and 43 of the moving guard 21 are engaged with the rail portions 31 and 32 of the fixed guard 20.

The moving side connecting members 41a to 41d are configured to overlap the fixed side connecting members 30a and 30b and the horizontal rails 23a and 23b in the front-rear direction.

The movement guard 21 is slidable along the rail parts 31 and 32, and the movement side bars 40b to 40d overlap with the fixed side bars 25a to 25c in the front and rear directions as shown in FIG. 6), the movable side bars 40b, 40c are positioned in the middle of the adjacent fixed side bars 25a, 25b and 25b, 25c as seen from the front-rear direction (see FIG. 6B). Hereinafter, it is referred to as a mismatched state).

In the coincidence state, the moving bar 40a overlaps with the longitudinal beam 22a in the front and rear direction. In the mismatched state, the moving bar 40a is located between the vertical beam 22a and the fixed rod 25a, and at the same time, the moving bar. 40d is located in the middle of the vertical bar 22b and the fixed side connecting member 25c.

In the coincidence state, the front window 2a is protected to some extent by the fixed guard 20, but the moving side bars 40a to 40d overlap the fixed side bars 25a to 25c and the vertical rail 22a in the front and rear, thereby improving the visibility. .

In the disagreement state, the moving side bars 40a to 40d, the fixed side bars 25a to 25c, and the longitudinal bars 22a are alternately and evenly arranged, so that the front window 2a can be protected to the same extent as a general guard device. .

Moreover, since it is only necessary to move the movement guard 21 horizontally in order to change the coincidence state and the disagreement state, a great effort is not required.

In the guard device, the moving guard 21 can be fixed to the moving guard 21 and the fixed guard 20 with the screw 50a in the matched state and the unmatched state.

Specifically, as shown in FIG. 7, in the coincidence state, the moving side hole 45 provided in the lower moving side connecting member 41d overlaps with the fixed side hole 34a provided in the lower side rail 23b, and the screw 50b is provided in the hole 45. And tightening through the hole 34a.

On the other hand, in the disagreement state indicated by the dotted line, the moving side hole 45 overlaps the fixed side 34b, and the screw 50b is tightened while passing through the moving side hole 45 and the fixed side hole 34b.

The movement side hole 45 and the fixed side holes 34a and 34b may be overlapped in the coincidence state and the disagreement state, and may be provided at a plurality of locations at the same time.

In the first embodiment, the fixed side holes 33a and 33b and the moving side hole 44 shown in FIGS. 4 and 5 are also overlapped in the coincidence state and the disagreement state and are tightened while being penetrated by the screw 50b as shown in FIG. ing.

When considering the ease of work, a fixed-side hole and a moving-side hole may be provided and screwed to the moving-side connecting member 41d and the horizontal rail 23b that are easily reachable by the operator. .

As described above, the guard device 3 according to the first embodiment can be used in a matching state or a mismatching state.

In order to change the coincidence state and the disagreement state, all the screws are removed, the movement guard 21 is moved along the rail portions 31 and 32 until the coincidence state or the disagreement state is obtained, and the screws are tightened again.

<Embodiment 2>
FIG. 8 shows the cab 1 equipped with the guard device 3 of the second embodiment.

In the second embodiment, the following points are the same as those in the first embodiment.

The front window 2 includes an upper window 2a and a lower window 2b, and the guard device 3 includes an upper guard 4 that covers the upper window 2a and a lower guard 5 that covers the lower window 2b.

The lower guard 5 has both left and right ends attached to the lower part of the front surface of the cab via a mounting bracket 10.

The upper guard 4 is attached to the left and right ends by the upper and lower hinges 11 and 12 so as to be freely opened and closed.

As shown in FIG. 9, locking devices 13 a and 14 a are provided on the upper and lower sides of the upper guard 4 opposite to the hinges 11 and 12, and when the upper guard 4 is closed, the locking devices 13 b and 14 b are engaged with each other. The point.

If the opening / closing function of the upper guard 4 is unnecessary, the upper guard 4 may be attached to the front surface of the cab via a mounting bracket in the same manner as the lower guard 5.

Now, the upper guard 4 is comprised from the movement guard 21 hold | maintained so that it may overlap with the fixed guard 20 and the fixed guard 20 like FIG.

As shown in FIG. 11, the fixed guard 20 includes a plurality of fixed side bars 25a, 25b, and 25c in a frame 24 on a rectangular frame formed of vertical bars 22a and 22b and horizontal bars 23a and 23b. They are arranged in parallel with the bars 22a and 22b at a predetermined interval.

Further, a plurality of fixed side connecting members 30a and 30b for connecting the fixed side bars 25a to 25c and the vertical bars 22a and 22b are provided, and the strength of the fixed guard 20 is maintained.

The fixed side holes 60a and 60b provided in the upper horizontal rail 23a and the fixed side holes 61a and 61b provided in the lower upper horizontal rail 23b are used when the moving guard 21 is fixed to the fixed guard 20, and are screwed. Is carved.

As shown in FIG. 12, the movement guard 21 is composed of a plurality of movement-side bar members 40a, 40b, 40c, and 40d that are arranged vertically and movement-side coupling members 41a, 41b, 41c, and 41d that connect the movement-side bar members. The

The movement guard 21 maintains the strength by providing a plurality of movement side coupling members 41a to 41d.

The moving side bars 40a to 40d are arranged so as to maintain a parallel and equivalent distance to the fixed side bars 25a to 25c and the vertical rail 22a.

The movement guard 21 includes a plurality of engaging portions 70 at portions where the moving side bar members 40a to 40d and the moving side connecting members 41a to 41d intersect, and the engaging portion 70 is located behind the moving side connecting members 41a to 41d. Are provided with engaging holes 71 inserted into the horizontal rails 23a and 23b and the fixed-side connecting members 30a and 30b.

FIG. 10 shows a state in which the engagement hole 71 of the moving guard 21 is engaged with the horizontal bars 23a and 23b of the fixed guard 20 and the fixed side connecting members 30a and 30b.

The moving side connecting members 41a to 41d are configured to overlap the fixed side connecting members 30a and 30b and the horizontal rails 23a and 23b in the front-rear direction.

The moving side bars 40a to 40d are stably held in strength by the plurality of engaging holes 71 being simultaneously engaged with the cross rails 23a and 23b and the fixed side connecting members 30a and 30b.

The moving side connecting members 41a to 41d are positioned in front of the fixed guard 20, but the moving side bar members 40a to 40d are arranged side by side with the fixed side connecting members 30a and 30b. Protrusion forward than 1 can be suppressed.

The movement guard 21 is slidable along the horizontal rails 23a and 23b and the fixed side connecting members 30a and 30b, and the moving side bars 40b to 40d are fixed to the fixed side bars 25a to 25a as shown in FIG. 25c and the coincidence state overlapped on the left and right, and between the fixed side bars 25a, 25b and 25b, 25c adjacent to each other when the moving side bars 40b, 40c are viewed from the front-rear direction of the cab 1 as shown in FIG. It can be changed to the disagreement state that is located.

In the coincidence state, the moving bar 40a overlaps with the longitudinal beam 22a in the front and rear direction. In the mismatched state, the moving bar 40a is located between the vertical beam 22a and the fixed rod 25a, and at the same time, the moving bar. 40d is located between the vertical bar 22b and the fixed bar 25c.

In the coincidence state, the front window 2a is protected to some extent by the fixed guard 20, but the moving side bars 40a to 40d overlap the fixed side bars 25a to 25c and the vertical rail 22a in the front and rear, thereby improving the visibility. .

In the disagreement state, the moving side bars 40a to 40d, the fixed side bars 25a to 25c, and the vertical bars 22a and 22b are alternately and evenly arranged to protect the front window 2a to the same extent as a general guard device. Can do.

Moreover, since it is only necessary to move the movement guard 21 horizontally in order to change the coincidence state and the disagreement state, a great effort is not required.

This guard device can prevent the movement guard 21 from moving by the block 81a in the coincidence state and the disagreement state.

Specifically, as shown in FIG. 14, in the coincidence state, a block 81a is provided at a position indicated by a dotted line between the moving bar 40d and the locking device 14a, and the movement of the movement guard 21 is prevented.

A screw 80a is attached to the block 81a, and is attachable to and detachable from the fixed side hole 61b provided in the cross rail 23.

On the other hand, in the inconsistent state, as shown in FIG. 15, the block 81b is provided at a position indicated by a dotted line between the moving bar 40a and the vertical rail 22a, and the movement of the moving guard 21 is prevented.

The block 81b is detachably attached to the fixed side hole 61a with a screw 80b.

The block 81a may be provided at a plurality of locations at the same time. In the second embodiment, the blocks 81c and 81d can be attached to the fixed side hole 60a or the hole 60b shown in FIG. Blocks 81c and 81d are attached to prevent the movement guard 21 from moving.

When considering the ease of work, the blocks may be attached to the fixed-side coupling members 30a and 30b having a height that can be easily reached by the operator.

Moreover, a block should just prevent the movement of the movement guard 21 in a coincidence state and a disagreement state, and may be attached to either of the movement side connection materials 41a-41d.

For example, in the guard device 3 in a mismatched state as shown in FIG. 16, the block 92 has a groove portion 93 that is sandwiched between the moving-side bar members 40b and 40c and sandwiches the fixed-side bar member 25b.

The block 92 can be fixed onto the moving-side connecting member 41 by tightening the screws 91a and 91b in the moving-side holes 90a and 90b, and the groove portion 93 that sandwiches the fixed-side bar 25 moves the moving guard 21. Disturb.

The block 92 can be mounted even in the coincidence state. In this case, the block 92 is sandwiched between the movable side bars 40b and 40c and is moved between the fixed side bars 25a and 25b. The movement of the guard 21 is obstructed.

As described above, the guard device 3 according to the second embodiment can be used in a matching state or a mismatching state.

To change the coincidence state and the disagreement state, remove all the blocks, move the movement guard 21 along the horizontal rails 23a, 23b and the fixed-side coupling members 30a, 30b until the coincidence state or the disagreement state, and again A block may be attached.

<Other embodiments>
In the above-described embodiment, a part of the moving bar 40 can be overlapped with the vertical rail 22. However, when the left and right width of the front window 2 is small compared to the guard device 3, The movable side bars 40a and 40d overlapping the vertical bars 22 may be omitted.

Further, in the above embodiment, measures have been taken to protect the front window 2a while improving the visibility only to the upper guard 4, but it is applied to a guard for protecting the lower guard 5 and the skylight (not shown) above the cab 1, You may comprise so that the front window 2b and the skylight of the cab 1 may be protected.

1 cab
2 Front window
2a Upper window
2b Lower window
3 Guard device
4 Upper guard
5 Lower guard
10 Mounting bracket
11 Hinge
12 Hinge
13a, 13b Locking device
14a, 14b Locking device
20 Fixed guard
21 Movement guard
22 Vertical rail
23 side pier
24 frames
25a-25c Fixed side bar
30a, 30b Fixed side connecting material
31, 32 Rail part
33a, 33b Fixed side hole
34a, 34b Fixed hole
40a-40d Moving side bar
41a-41d Moving side connecting material
42, 43 Projection
44, 45 Movement side hole
50a, 50b screw
60a, 60b Fixed side hole
61a, 61b Fixed side hole
70 engaging part
71 engagement hole
80 screws
81a-81d block
90a, 90b Movement side hole
91a, 91b screw
92 blocks
93 Groove

Claims (13)

In the cab guard device that protects the cab of the work machine,
A fixed guard which is attached to the outside of the cab window via a mounting bracket and forms a rectangular frame frame by a vertical beam and a horizontal beam, and is held by the fixed guard and can be moved in the vertical direction or the horizontal direction of the fixed guard. With a moving guard
The fixed guard is configured so that a plurality of fixed-side bars in the frame are parallel to the vertical beam or the horizontal beam and maintain a predetermined interval,
The movement guard is composed of a plurality of movement side bars arranged in parallel with the same direction as the direction of the fixed side bar and parallel to each other, and a movement side coupling member connecting the movement side bars .
A matching state proximate to overlap with one of the stationary bar of said movable rod when viewed from directly facing direction to the window adjacent the movable rod when viewed from directly facing direction to the window There can be changed in a mismatch condition located between in said stationary bar adjacent said,
The cab guard device according to claim 2, wherein the movement guard can be fixed to the fixed guard in the two states. The fixed guard is attached to the front surface of the cab via the mounting bracket so as to face the outside of the window with a gap therebetween, and a plurality of the fixed-side bar members are attached to the vertical rail in the frame. It is configured to keep a predetermined distance in parallel,
The moving guard is movable in the lateral direction of the fixed guard, and the movement in the vertical direction is restricted. In the coincidence state, the moving side bar is adjacent to one of the fixed side bars and either the front, back, left or right 2. The cab guard device according to claim 1, wherein the moving side bar is positioned between the adjacent fixed side bars as viewed from the front-rear direction in the inconsistent state. The moving bar is provided in the same state so as to overlap the fixed bar as viewed from the direction facing the window at a position farther from the cab than the fixed bar. The cab guard device according to any one of claims 1 and 2. The moving side bar is in the disagreement state, and the distance from the window is equal to that of the fixed side bar, and is arranged side by side with the fixed side bar. The cab guard device described in 1. The fixed guard or the moving guard is located between the fixed side bar adjacent to the moving side bar as viewed from the position where the moving side bar is close to the fixed side bar and the direction facing the window. The cab guard device according to any one of claims 1 to 4, further comprising a rail that holds the movement guard so as to be movable between the position and the position. The moving bar is provided with an engaging portion, and the engaging portion has an engaging hole inserted through the horizontal beam or the vertical beam along the moving direction of the moving guard. The cab guard device according to claim 1. The engagement hole is inserted into a fixed-side connecting material, and the fixed-side connecting material is provided in the fixed guard, intersects the fixed-side bar material perpendicularly, and connects the fixed-side bar material. The cab guard device according to claim 6. The moving guard includes a plurality of moving side connecting members, and the moving side connecting members intersect the moving side bars perpendicularly and connect the moving side bars. The cab guard apparatus in any one. The said moving side connection material is provided so that it may overlap with the side away from the said window of the said horizontal crosspiece or the said vertical crosspiece along the moving direction of the said movement guard. Cab guard device. The cab guard device according to claim 7, wherein the moving side connecting member is provided so as to overlap a side of the fixed side connecting member away from the window. The fixed guard or the movement guard is provided with a detachable block, and the block abuts on either the fixed guard or the movement guard to prevent the movement guard from moving. The cab guard apparatus in any one of -10. The moving guard is formed with a moving side hole, the fixed guard is formed with a fixed side hole, and the moving side hole and the fixed side hole are overlapped with each other and penetrates the moving side hole and the fixed side hole. The cab guard device according to any one of claims 6 to 11, wherein a screw is inserted. As the moving guard moves, either the vertical beam or the horizontal beam is close to either the vertical beam or the horizontal beam in the coincidence state, and viewed from the direction facing the window in the mismatch state. The cab guard device according to any one of claims 1 to 12, wherein the moving side bar located between the fixed side bars is added.

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